Let the efficiency of B be 10x units/day
Efficiency of A = 120/100×10x =12x units/day
Efficiency of C = 5/6×12x =10x units/day
Total work = (10x+12x+10x)×90 = 32x × 90 units
Required time = 5/9×(32x × 90)/(10x+10x)=80 days
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60 Mins English English35 Questions35 Marks20 Mins English English120 Questions120 Marks90 Mins EnglishWorking together A, B and C can complete a certain work in 40 days. B and C together can complete thesame work in 60 days. B is 25% more efficient than A. In how many days will C alone complete 40% ofthe same work?
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